What is CVE-2026-42005?

CVE-2026-42005 is a medium-severity vulnerability in Powerdns Authoritative, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2026-06-25.

How severe is CVE-2026-42005?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Resource exhaustion in Powerdns Authoritative

CVE-2026-42005

An attacker can send a web request that causes unlimited memory allocation in the internal web server, leading to a denial of service. The internal web server is disabled by default.

Vulnerability class: DoS (Denial of Service)

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Powerdns Authoritative — versions 4.9.0, 5.0.0, 5.1.0

Weakness classification (CWE)

CWE-400 — Uncontrolled Resource Consumption

References

security@open-xchange.com

Frequently asked questions

What is CVE-2026-42005?: CVE-2026-42005 is a medium-severity vulnerability in Powerdns Authoritative, classified under Uncontrolled Resource Consumption. CVSS score: 4.3/10. Published 2026-06-25.
How severe is CVE-2026-42005?: Medium severity. CVSS v3 base score is 4.3 out of 10.